f/overrides/event-backup/cbfyx-dividend.csv
Greg Pomerantz bb8e39605e Event-history protection: backup dir, empty-download fallback, docs
Yahoo's 2026 event-feed change (capitalGain events dropped for some
funds; no events at all for terminated tickers) can wipe good event
history on re-download. Defense in depth:

- overrides/event-backup/: last-known-good copy of every dividend/
  capitalGain file (8,192 files, 58 MB); refresh with
  scripts/backup_events.py after each dump update
- data.py event_file(): frozen > data-root (while populated) > backup;
  used by panel reads, verify_official, and the double-listing scanner
- README: capital-gain files are mutual-fund-only in this dump; Yahoo
  has no LT/ST split (tax.py taxes capg at lt_rate; the per-fund split
  would come from fund-company annual tax statements or commercial feeds)
- tests: exact Timestamp .loc keys (pandas 3.x string matching returns a
  Series on large DatetimeIndex)
2026-08-31 21:59:25 -04:00

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Date,Dividends
2012-05-31,0.100000
2012-10-31,0.096000
2016-04-29,0.068000
2016-07-29,0.068000
2017-04-28,0.044000
2019-10-31,0.088000
2020-08-31,0.296000
2022-02-28,0.048000
2015-06-30,0.068000
2021-10-29,0.051000
2021-11-30,0.049000
2022-07-29,0.066000
2023-12-29,0.114000
2012-04-30,0.100000
2014-03-31,0.064000
2014-11-28,0.068000
2014-12-31,0.064000
2021-07-30,0.051000
2022-01-31,0.053000
2023-05-31,0.100000
2023-08-31,0.114000
2010-09-30,0.100000
2011-10-31,0.096000
2013-01-31,0.076000
2013-03-28,0.076000
2013-11-29,0.072000
2014-02-28,0.064000
2017-08-31,0.068000
2017-10-31,0.068000
2017-12-29,0.072000
2020-04-30,0.076000
2023-01-31,0.093000
2024-10-31,0.110000
2010-07-30,0.112000
2013-05-31,0.072000
2013-12-03,1.152000
2010-02-26,0.112000
2015-02-27,0.056000
2018-05-31,0.076000
2019-04-30,0.096000
2023-11-30,0.113000
2025-05-30,0.107000
2011-08-31,0.108000
2015-08-31,0.060000
2016-08-31,0.064000
2016-10-31,0.064000
2017-06-30,0.048000
2019-01-31,0.092000
2009-10-30,0.116000
2015-11-30,0.912000
2018-11-30,0.088000
2019-12-31,0.084000
2020-12-31,0.073000
2021-12-31,0.056000
2022-06-30,0.057000
2010-08-31,0.108000
2011-04-29,0.112000
2012-11-30,0.940000
2013-09-30,0.072000
2018-02-28,0.068000
2024-05-31,0.107000
2025-04-30,0.102000
2010-11-30,0.100000
2011-03-31,0.104000
2014-06-30,0.064000
2015-04-30,0.064000
2016-03-31,0.072000
2018-12-31,0.116000
2022-04-29,0.051000
2022-10-31,0.097000
2025-08-29,0.109000
2009-11-30,0.112000
2010-03-31,0.116000
2010-05-28,0.116000
2015-03-31,0.060000
2015-09-30,0.068000
2019-08-30,0.088000
2024-08-30,0.111000
2012-01-31,0.096000
2012-06-29,0.416000
2017-07-31,0.044000
2017-11-30,0.116000
2021-08-31,0.049000
2023-07-31,0.110000
2024-02-29,0.108000
2012-02-29,0.088000
2013-12-31,0.068000
2014-01-31,0.076000
2016-06-30,0.068000
2017-09-29,0.068000
2019-06-28,0.092000
2015-05-29,0.064000
2010-10-29,0.100000
2011-06-30,0.280000
2015-10-30,0.064000
2019-05-31,0.092000
2023-09-29,0.113000
2024-07-31,0.112000
2012-07-31,0.104000
2014-10-31,0.068000
2017-03-31,0.068000
2021-05-28,0.055000
2022-09-30,0.089000
2013-06-28,0.068000
2019-02-28,0.088000
2019-11-29,0.084000
2020-06-30,0.080000
2020-09-30,0.073000
2021-03-31,0.059000
2021-06-30,0.054000
2023-04-28,0.092000
2024-06-28,0.109000
2025-10-31,0.114000
2022-12-30,0.127000
2023-02-28,0.092000
2013-10-31,0.076000
2018-04-30,0.072000
2018-06-29,0.072000
2018-10-31,0.084000
2021-04-30,0.054000
2022-03-31,0.050000
2024-04-30,0.108000
2013-02-28,0.068000
2013-07-31,0.064000
2020-07-31,0.076000
2025-07-31,0.110000
2014-07-31,0.060000
2018-03-29,0.072000
2020-02-28,0.080000
2021-01-29,0.070000
2012-09-28,0.092000
2014-12-02,0.456000
2019-12-02,0.444000
2020-01-31,0.084000
2024-12-31,0.115000
2016-05-31,0.068000
2022-05-31,0.051000
2024-09-30,0.110000
2010-06-30,0.112000
2010-12-02,0.516000
2012-03-30,0.112000
2013-08-30,0.068000
2014-05-30,0.064000
2019-09-30,0.088000
2020-12-01,0.862000
2021-02-26,0.064000
2017-01-31,0.064000
2025-03-31,0.103000
2010-06-21,0.240000
2013-04-30,0.076000
2014-09-30,0.068000
2016-12-30,0.076000
2018-09-28,0.080000
2023-06-30,0.105000
2025-11-28,0.111000
2011-01-31,0.112000
2011-07-29,0.112000
2011-11-30,0.420000
2015-12-31,0.260000
2016-01-29,0.064000
2018-08-31,0.076000
2020-05-29,0.080000
2022-11-30,0.105000
2024-03-28,0.104000
2025-01-31,0.110000
2025-06-30,0.109000
2014-04-30,0.068000
2015-01-30,0.064000
2016-09-30,0.060000
2018-01-31,0.068000
2022-08-31,0.077000
2023-03-31,0.090000
2024-11-29,0.115000
2010-01-29,0.112000
2011-02-28,0.108000
2011-12-30,0.100000
2012-12-31,0.084000
2017-02-28,0.064000
2018-07-31,0.076000
2019-03-29,0.096000
2023-10-31,0.120000
2024-01-31,0.112000
2015-07-31,0.064000
2016-02-29,0.064000
2016-11-30,0.884000
2019-07-31,0.092000
2020-10-30,0.071000
2020-11-30,0.076000
2021-09-30,0.049000
2025-09-30,0.109000
2011-05-31,0.120000
2012-08-31,0.096000
2020-03-31,0.080000
2025-02-28,0.102000
2010-12-31,0.108000
2011-09-30,0.104000
2014-08-29,0.060000
2017-05-31,0.036000